Does gamma equal density in Kg/m^3?

  • Thread starter Parsifal1
  • Start date
  • #1
61
3
I want to use the equation:

Fr='gamma'*distance from centroid*Area

but the example is showing density in N/m^3

while I only have the density in kg/m^3

Does this mean I have to multiply it by 9.81 to get the right answer?

Thanks.
 

Answers and Replies

  • #2
SteamKing
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I want to use the equation:

Fr='gamma'*distance from centroid*Area

but the example is showing density in N/m^3

while I only have the density in kg/m^3

Does this mean I have to multiply it by 9.81 to get the right answer?

Thanks.
γ is known as the 'weight density' of a substance. γ = ρ ⋅ g, where ρ is the mass density and g is the acceleration due to gravity.
 
  • #3
61
3
γ is known as the 'weight density' of a substance. γ = ρ ⋅ g, where ρ is the mass density and g is the acceleration due to gravity.
So, pgh is expressed in N/m^3 as opposed to Kg/m^3?
 
  • #4
SteamKing
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So, pgh is expressed in N/m^3 as opposed to Kg/m^3?
No. Re-read Post #2 again carefully and then work out the units of ρgh versus just ρg.
 

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